Conductive washer



y 1966 J. w. SPISELMAN ET\AL 3,253,080

CONDUCTIVE WASHER Original Filed June 26. 1961 INVENTORS JOSEPH W. SPISELMAN DAVID S. BERNSTEIN ATTORNEYS United States Patent v 3, 0 CONDUCTIVE WASHER Joseph W. Spiselman, Brooklyn, N.Y., and David S. Bernstein, Teaneck, N.J., assignors, by mesne assignments, to Floating Floors Inc., New York, N.Y., a corporation of New York Original application June 26, 1961, Ser. No. 119,429, now Patent No. 3,199,257, dated Aug. 10, 1965. Divided and this application Dec. 28, 1964, Ser. No. 438,442

. 4 Claims. (Cl. 1741)v This application is a division of our cO-pending application, Serial No. 119,429, now Patent No. 3,199,257.

This invent-ion relates to a new and improved conductive washer construct-ion adap-ted'to provide a cushioning or gasket effect through the use of relatively soft, resilient non-conductive spongy material but at the same time providing for the conductance of electricity through the same by metallic conductive means without, however, losing or sacrificing the cushioning effect of the device.

Another'object of the invention resides in the provision of a conductive washer for a pedestal for elevalted flooring such as for example is illustrated in US. Patent No. 2,830,332 issued April 15, 1959, wherein pedestals are arranged at intervals over a'sub-floor and metal panels or plates forming the elevated floor are set thereon, there being ordinarily a washer placed on the top surface of each pedestal upon which the metal elevated flooring directly rests in order to reduce noise and wear between the metal of the flooring and the metal of the pedestal. In some cases it is desired to have the metal flooring panels electrically grounded, but the washers or gaskets on the pedestals, acting as insulators, prevent the grounding, and it is in this instance that the novel conductive washer forming the subject matter of the present invention is particularly useful, while still however retaining the sound deadening and cushioning effect of the washer itself.

Other objects and advantages of the appear hereinafter.

Reference is to be had to the accompanying drawings, in which FIG. 1 is a top plan view of a washer according to the present invention;

FIG. 2 is a bottom view showing a portion of the protective cover removed;

FIG. 3 is an enlarged section on line 33 of FIG. 1;

FIG. 4 is an edge view looking in the direction of arrow 4 in FIG. 1;

FIG. 5 is an edge view looking in the direction of arrow 5 in FIG. 1;

FIG. 6 is a top plan view on a reduced scale of an elevated flooring pedestal with the new conductive washer in position; and

FIG. 7 is a view in elevation illustrating the pedestal with the flooring in position on the washer, parts being in section.

The present invention comprises essentially a small sheet of resilient material 10 which is made of any material suitable for forming a washer, gasket, or resilient pad. This material could be rubber or sponge rubber, plastic, cork, leather, etc., but by its very nature is an insulator against vibration, noise and electricity.

As shown in the drawings, the shape of this Washer is substantially square but of course it may be also rectangular, round, oval, etc.

An open continuous frame of electricity-conducting material is arranged at one side surface of the sheet of washer material 10. This frame conforms in general to the shape of the edge of the washer material 10 and is indicated generally by the reference numeral 12. As clearly indicated in the drawings, the frame 12 invention will 3,253,080 Patented May 24, 1966 sets on the sheet of material 10 which extends in general to the side edges of the frame, see for instance FIG. '3. Any electric contact made anywhere in the surface of frame 12 will be conducted to all other parts of theframe.

The frame 12 is provided with a series of bent down tabs 14 which encompass certain edge portions of the sheet 10 and serve to connect the elecrticity-co'nducting frame 12 to the electricity-insulative sheet 10 and they also have a more important function which is to conduct the electricity from one side surface of the washer to the opposite side surface thereof. This of course is accomplished by reason of the fact that the tabs 14 are integral or firmly secured to the frame 12. Thus any electric connection to the frame 12 will be transmitted to the opposite side of the washer by means of tabs 14 and thus transmitted to any electricity conducting member upon which the conductive washer of the present invention is set.

It is to be emphasized that the frame 12 and the tabs 14 are made of thin, easily bendable material such as for instance aluminum, so that if a heavy object should be placed upon the washer, it still will obtain the benefits of the resiliency of the washer material, and it is to be particularly noted that the tabs 14 are relatively widely spaced, being in the case illustrated in the present invention located at the corners of the washer.

The lower surface as at 18 of the washer material may be coated with a pressure sensitive adhesive disposable cover 20 so that the Washer may be located in desired position and will not be liable to become lost from its situation. Also the material of the frame 12 being thin, it may be bent to be shaped to any irregular surface and it will therefore substantially cause the resilient washer material to conform to the shape to which it is bent.

A washer of the construction described is particularly useful in elevated flooring which is illustrated in FIG. 7. In this case it will be seen that there is a pedestal at 22 which may be if desired mounted on a plate 24. In this case the pedestal is screw-threaded and supports a nut as at 26. There may be a lock nut employed also, or a locking member 28 as defined in copending patent application Serial No. 63,404, now patent No. 3,084,911.

On the nut 26 there is mounted a head 30 and this in turn is provided with a series of projections 32, 32 which serve to help locate the flanges 34, 36 of elevated flooring panels 38, 38. i The washer of the present invention is indicated in FIG. 7 by the reference numeral 40 and it will be seen that the flanges 36 must contact the frame 12 as disclosed for instance in FIG; 1 of the present invention, and this effect is perhaps clearer. from an inspection of FIG. 6. The washer 10, 12 is adhesively secured generally in the position shown in FIG. 6 and the center lines 42 and 44 indicate the adjacent edges of four panels 38, the corners of which are supported on the pedestal. It will be seen that each one of the four must contact a portion of the frame 12 and thus be grounded with respect to the pedestal. Thus it will be seen that the panels 38 are electrically connected with respect to the pedestal 22 but at the same time the conductive washer maintains and preserves its resiliency and prevention of noise as would be present wene the panels 38 to rest directly upon the pedestal 30'. This provides an extremely simple and inexpensive way of cushioning the panels to lessen the noise between the panels and the pedestals while at the same time providing for an electric connection between the same.

Having thus described our invention and the advantages thereof, we do not wish to be limited to the details herein disclosed, otherwise than as set forth in the claims, but what we claim is: v

1. A conductive washer comprising a sheet of non-conducting material, a frame of electric conducting material located at one side .of said sheet, said conductive material being relatively soft and flexible, means on said frame extending down and around certain of the edges of said sheet onto the opposite side surface thereof from said frame, said means serving to connect the frame to said sheet, and adhesive on said opposite side surface of said sheet.

2. A conductive washer comprising a sheet of nonconducting material, a frame of electric conducting material located at one side of said sheet, said conductive material'being relatively soft and flexible, means on said frame extending down and around'certain of the edges of said sheet onto the opposite side surface thereof from said frame, said means serving to connect the frame to said sheet, pressure sensitive adhesive on said washer, and a disposable protective cover on the adhesive.

3. A conductive Washer comprising a sheet of non-conducting material, a frame of electric conducting material located at'one side'of said sheet, said conductive material being relatively soft and flexible, means on said frame extending down and around certain of the edges of said sheet onto the opposite side surface thereof from said frame, said means serving to connect the frame to said she et, adhesive on said opposite side surface of said sheet, and a disposable protective cover on the adhesive.

4. A conductive Washer adapted to be interposed between a pedestal and a plurality of panels supported thereby, said washer comprising a sheet of non-conducting material, a frame of electric conducting material located at one side of said sheet and extending around the periphcry of said one side, and electrically-conducting tabs integral with said frame and extending around corner edges of said sheet to the opposite side thereof and disposed on corner surfaces of said opposite side.

References Cited by the Examiner UNITED STATES PATENTS 741,808 10/1903 Miner 277207 X 857,134 6/1907 Wilcox 277-234 X 1/ 1929 Olsson et a1. 174-77 X OTHER REFERENCES Zinke et 211., German Printed Application, No. 531,578, published Dec. 20, 1956.

ROBERT K. SCHAEFER, Primary Examiner.

DARRELL L. CLAY, Examiner. 

4. A CONDUCTIVE WASHER ADAPTED TO BE INTERPOSED BETWEEN A PEDESTAL AND A PLURALITY OF PANELS SUPPORTED THEREBY, SAID WASHER COMPRISING A SHEET OF NON-CONDUCTING MATERIAL, A FRAME OF ELECTRICAL CONDUCTING MATERIAL LOCATED AT ONE SIDE OF SAID SHEET AND EXTENDING AROUND THE PERIPHERY OF SAID ONE SIDE, AND ELECTRICALLY-CONDUCTING TABS INTEGRAL WITH SAID FRAME AND EXTENDING AROUND CORNER EDGES OF SAID SHEET TO THE OPPOSITE SIDE THEREOF AND DISPOSED ON CORNER SURFACES OF SAID OPPOSITE SIDE. 